64531359394 has 16 divisors (see below), whose sum is σ = 101073096000. Its totient is φ = 30842202160.

The previous prime is 64531359391. The next prime is 64531359413. The reversal of 64531359394 is 49395313546.

64531359394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (64531359391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398977 + ... + 536884.

It is an arithmetic number, because the mean of its divisors is an integer number (6317068500).

Almost surely, 2^64531359394 is an apocalyptic number.

64531359394 is a deficient number, since it is larger than the sum of its proper divisors (36541736606).

64531359394 is a wasteful number, since it uses less digits than its factorization.

64531359394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937385.

The product of its digits is 5248800, while the sum is 52.

The spelling of 64531359394 in words is "sixty-four billion, five hundred thirty-one million, three hundred fifty-nine thousand, three hundred ninety-four".